CN110165223A - Current collector, pole piece, battery and current collector manufacturing method - Google Patents
Current collector, pole piece, battery and current collector manufacturing method Download PDFInfo
- Publication number
- CN110165223A CN110165223A CN201810150732.7A CN201810150732A CN110165223A CN 110165223 A CN110165223 A CN 110165223A CN 201810150732 A CN201810150732 A CN 201810150732A CN 110165223 A CN110165223 A CN 110165223A
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- insulating layer
- conductive layer
- collector
- layer
- articulamentum
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- 238000007747 plating Methods 0.000 claims description 4
- 125000004122 cyclic group Chemical group 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 238000004146 energy storage Methods 0.000 abstract description 2
- -1 abbreviation PA) Polymers 0.000 description 13
- 238000000034 method Methods 0.000 description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 239000004411 aluminium Substances 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 239000004793 Polystyrene Substances 0.000 description 4
- 239000007769 metal material Substances 0.000 description 4
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 4
- 239000004810 polytetrafluoroethylene Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000004080 punching Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 239000002033 PVDF binder Substances 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 3
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 description 3
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 3
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 description 3
- 239000011149 active material Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
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- 238000009413 insulation Methods 0.000 description 3
- 229920001707 polybutylene terephthalate Polymers 0.000 description 3
- 239000004417 polycarbonate Substances 0.000 description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 description 3
- 239000005020 polyethylene terephthalate Substances 0.000 description 3
- 229920006324 polyoxymethylene Polymers 0.000 description 3
- 229920002223 polystyrene Polymers 0.000 description 3
- 239000004800 polyvinyl chloride Substances 0.000 description 3
- 229920000915 polyvinyl chloride Polymers 0.000 description 3
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 2
- 238000010009 beating Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229920001568 phenolic resin Polymers 0.000 description 2
- 238000005289 physical deposition Methods 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 229920000515 polycarbonate Polymers 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 229920001955 polyphenylene ether Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 229920002379 silicone rubber Polymers 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 125000001140 1,4-phenylene group Chemical group [H]C1=C([H])C([*:2])=C([H])C([H])=C1[*:1] 0.000 description 1
- BVPWJMCABCPUQY-UHFFFAOYSA-N 4-amino-5-chloro-2-methoxy-N-[1-(phenylmethyl)-4-piperidinyl]benzamide Chemical compound COC1=CC(N)=C(Cl)C=C1C(=O)NC1CCN(CC=2C=CC=CC=2)CC1 BVPWJMCABCPUQY-UHFFFAOYSA-N 0.000 description 1
- 208000032953 Device battery issue Diseases 0.000 description 1
- 229910000792 Monel Inorganic materials 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229910001093 Zr alloy Inorganic materials 0.000 description 1
- 239000006230 acetylene black Substances 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 239000002041 carbon nanotube Substances 0.000 description 1
- 229910021393 carbon nanotube Inorganic materials 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 229910021389 graphene Inorganic materials 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000001755 magnetron sputter deposition Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920003366 poly(p-phenylene terephthalamide) Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920013636 polyphenyl ether polymer Polymers 0.000 description 1
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- KKEYFWRCBNTPAC-UHFFFAOYSA-L terephthalate(2-) Chemical compound [O-]C(=O)C1=CC=C(C([O-])=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-L 0.000 description 1
- 238000002207 thermal evaporation Methods 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/70—Carriers or collectors characterised by shape or form
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/70—Carriers or collectors characterised by shape or form
- H01M4/72—Grids
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Cell Electrode Carriers And Collectors (AREA)
Abstract
The application relates to the technical field of energy storage, in particular to a current collector, a pole piece, a battery and a current collector manufacturing method. The current collector comprises an insulating layer and a conductive layer, wherein a plurality of through holes are formed in the insulating layer; the conducting layer comprises a first conducting layer, a second conducting layer and a connecting layer for connecting the first conducting layer and the second conducting layer, the first conducting layer and the second conducting layer are arranged on two opposite sides of the insulating layer, and the connecting layer is arranged on the inner wall surface of the through hole. Design like this makes the conducting layer parcel on the insulating layer, can alleviate the conducting layer and from the complete condition that drops on the insulating layer, in addition, because the articulamentum belongs to a part of conducting layer, this articulamentum also has electric conductivity, consequently, connects the first conducting layer and the second conducting layer of the relative both sides of insulating layer through the articulamentum, can reduce the resistance of mass flow body.
Description
Technical field
This application involves technical field of energy storage more particularly to a kind of collector, pole piece, battery and collector production methods.
Background technique
With the development of modern society, mobile phone, video camera, laptop, portable DVD player, digital camera etc. are consumer
Electronic product and electric car, which have, to be more and more widely used, and while they are used widely, user closes it
The performance requirement of key member battery is also higher and higher.
Currently, in order to improve the performance of battery, it is proposed that a kind of composite current collector, the composite current collector include insulating layer
And the conductive layer of covering on the insulating layer, but in subsequent cold pressure procedure, since insulating layer and conductive layer cold pressing elongation percentage are different
Sample is easy to cause collector stripping phenomenon occur, it may be assumed that the case where being easy to appear conductive layer and insulating layer separation reduces afflux
Body stability in use.In addition, the conductive layer of insulating layer two sides be usually in it is separately positioned, cause the resistance of collector larger.
Summary of the invention
This application provides a kind of collector, pole piece, battery and collector production methods, and it is de- can be effectively improved collector
The case where film, the stability in use of collector is improved, while reducing the resistance of collector.
The application first aspect provides a kind of collector comprising:
Insulating layer is formed with multiple through holes on the insulating layer；
Conductive layer, the conductive layer include the first conductive layer, the second conductive layer and connection first conductive layer and described
The opposite sides of the insulating layer is arranged in the articulamentum of second conductive layer, first conductive layer and second conductive layer,
The articulamentum is arranged on the inner wall of the through hole.
Preferably, the articulamentum encloses to set to be cyclic annular is formed with stress relief hole.
Preferably, each stress relief hole is uniformly arranged in array.
Preferably, the spacing in stress relief hole described in each row between the two neighboring stress relief hole be 0.5mm~
1mm；And/or
Respectively arranging the spacing in the stress relief hole between the two neighboring stress relief hole is 0.5mm~1mm.
Preferably, the porosity of the collector is 0.02%~2%, and the porosity is each stress relief hole
The ratio of the sum of area and the gross area of the collector.
The application second aspect provides a kind of pole piece comprising collector described in any of the above embodiments.
The application third aspect provides a kind of battery comprising pole piece described above.
The application fourth aspect provides a kind of collector production method, for making afflux described in any of the above embodiments
Body comprising:
Make insulating layer；
The insulating layer is punched, so as to form multiple through holes on the insulating layer；
Conductive material is plated on the insulating layer for being formed with multiple through holes, so that the insulating layer is opposite
The first conductive layer, the second conductive layer and articulamentum, the articulamentum are respectively formed on the inner wall of two sides and the through hole
Connect first conductive layer and second conductive layer.
Preferably, the production insulating layer, specifically:
The insulating layer is made using high molecular material.
It is preferably, described to be plated in conductive material on the insulating layer for being formed with multiple through holes, specifically:
Conductive material is plated in the insulation for being formed with multiple through holes by vapour deposition process or chemical plating
On layer.
Technical solution provided by the present application can achieve it is following the utility model has the advantages that
The articulamentum of collector provided herein, conductive layer is located in the through hole of insulating layer, and the articulamentum
The first conductive layer and the second conductive layer are connected, design is so that conductive layer package on the insulating layer, can be relieved conductive layer from exhausted in this way
The case where falling off in edge layer, and in subsequent cold pressure procedure, the elongation of insulating layer is reduced under the obstruction of articulamentum, because
This, can reduce the stress generated between insulating layer and conductive layer, so that the stress between insulating layer and conductive layer is less than insulating layer
Cohesive force between conductive layer, thus the case where being effectively improved collector demoulding, it may be assumed that be effectively improved the first conductive layer and second
The case where conductive layer is separated with insulating layer；In addition, the articulamentum also has conduction since articulamentum belongs to a part of conductive layer
Property, therefore, the first conductive layer and the second conductive layer of the opposite sides of insulating layer are connected by articulamentum, can reduce collector
Resistance.
It should be understood that the above general description and the following detailed description are merely exemplary, this can not be limited
Application.
Detailed description of the invention
Fig. 1 is the schematic diagram of collector provided by the embodiment of the present application；
Fig. 2 is the schematic cross-sectional view in the direction A-A shown in FIG. 1；
Fig. 3 is the enlarged structure schematic diagram in the portion B shown in Fig. 2；
Fig. 4 is the schematic diagram of the insulating layer of collector provided by the embodiment of the present application；
Fig. 5 is the flow chart of collector production method provided by the embodiment of the present application.
Appended drawing reference:
10- collector；
12- insulating layer；
120- through hole；
The first conductive layer of 14-；
The second conductive layer of 16-；
18- articulamentum；
180- stress relief hole.
The drawings herein are incorporated into the specification and forms part of this specification, and shows the implementation for meeting the application
Example, and together with specification it is used to explain the principle of the application.
Specific embodiment
The application is described in further detail below by specific embodiment and in conjunction with attached drawing.
As shown in Figures 1 to 4, the embodiment of the present application provides a kind of collector 10, which is applied to production electricity
In the pole piece in pond, it can also be cathode pole piece which, which can be anode pole piece,.
Wherein, which is composite current collector comprising height can be used in insulating layer 12 and conductive layer, the insulating layer 12
Molecular material is made, which can be polyamide (Polyamide, abbreviation PA), polyester terephthalate
(Polyethylene terephthalate, abbreviation PET), polyimides (Polyimide, abbreviation PI), polyethylene
(Polyethylene, abbreviation PE), polypropylene (Polypropylene, abbreviation PP), polystyrene (Polystyrene, abbreviation
PS), polyvinyl chloride (Polyvinyl chloride, abbreviation PVC), acrylonitrile-butadiene-styrene copolymer
(Acrylonitrile butadiene styrene copolymers, abbreviation ABS), polybutylene terephthalate (PBT)
(Polybutylene terephthalat, abbreviation PBT), poly(p-phenylene terephthalamide) (Poly-p-phenylene
Terephthamide, abbreviation PPA), epoxy resin (epoxy resin), polystyrene (polyphenylene ether, letter
Claim PPE), polyformaldehyde (Polyformaldehyde, abbreviation POM), phenolic resin (Phenol-formaldehyde resin),
Polytetrafluoroethylene (PTFE) (Polytetrafluoroethylene, abbreviation PTFE), silicon rubber (Silicone rubber), polyvinylidene fluoride
At least one in alkene (Polyvinylidenefluoride, abbreviation PVDF), polycarbonate (Polycarbonate, abbreviation PC)
Kind；And conductive metal material can be used in conductive layer or carbon-based conductive material is made, the conductive metal material can for aluminium, copper,
At least one of nickel, titanium, silver, monel, aluminium zircaloy, the carbon-based conductive material can for graphite, acetylene black, graphene,
At least one of carbon nanotube, it is preferable that when the collector 10 is applied to anode pole piece, the conductive layer of the collector 10 can
Be made using aluminium, when the collector 10 be applied to cathode pole piece when, the conductive layer of the collector 10 can be used copper make and
At.
Since conductive layer is made of metal material or carbon-based material, and insulating layer 12 is made of high molecular material, this
Sample make the insulating layer 12 of collector 10 it is different from the elongation of conductive layer (elongation of usual situation insulating layer 12 be greater than conduction
The elongation of layer), specifically, the elongation of insulating layer 12 is about 1%, and the elongation of conductive layer is about 0.4%~0.6%,
It carrying out in subsequent cold pressure procedure, the length L1 that insulating layer 12 extends is greater than the length L2 that conductive layer extends, it is carried out when cold pressing is continuous,
The extended length difference Δ L (Δ L=L1-L2) of insulating layer 12 and conductive layer constantly accumulates, it may be assumed that Δ L is increasing, when Δ L is more next
When bigger, the stress F1 between insulating layer 12 and conductive layer is also increasing, as the stress F1 between insulating layer 12 and conductive layer
When greater than cohesive force F2 between insulating layer 12 and conductive layer, conductive layer starts to fall off from insulating layer 12.
Therefore, in order to alleviate insulating layer 12 and conductive layer demoulding the case where, can be formed on the insulating layer 12 of collector 10
There are multiple through holes 120, and conductive layer includes the first conductive layer 14 and second of the first conductive layer 14, the second conductive layer 16 and connection
The opposite sides of insulating layer 12 is arranged in the articulamentum 18 of conductive layer 16, first conductive layer 14 and the second conductive layer 16, connection
Layer 18 is arranged on the inner wall of through hole 120.
Since articulamentum 18 is located in through hole 120, and the articulamentum 18 connects the first conductive layer 14 and the second conductive layer
16, in this way design so that conductive layer package on the insulating layer 12, can reduce the case where conductive layer falls off from insulating layer 12, and
In subsequent cold pressure procedure, the elongation of insulating layer 12 is reduced under the obstruction of articulamentum 18, therefore, can reduce insulating layer 12
The stress generated between conductive layer, so that the stress between insulating layer 12 and conductive layer is less than between insulating layer 12 and conductive layer
Cohesive force, thus the case where being effectively improved 10 demoulding of collector, it may be assumed that be effectively improved the first conductive layer and the second conductive layer and absolutely
The case where edge layer 12 separates；In addition, the articulamentum 18 is also conductive since articulamentum 18 belongs to a part of conductive layer,
Therefore, the first conductive layer 14 and the second conductive layer 16 that the opposite sides of insulating layer 12 is connected by articulamentum 18, can reduce
The resistance of collector 10.
Optionally, articulamentum 18 encloses to set to be cyclic annular is formed with stress relief hole 180, and specifically, which has
Outer ring surface and inner ring surface, the outer ring surface are bonded with the inner wall of through hole 120, and inner ring surface, which encloses to set, is formed with stress relief hole 180,
In cold pressure procedure, the stress between insulating layer 12 and conductive layer can discharge at stress relief hole 180, so that insulation
Layer 12 and the extended length difference Δ L of conductive layer are approximately equal to 0, and the stress F1 between such conductive layer and insulating layer 12 is less than conductive layer
Cohesive force F2 between insulating layer 12, the case where being effectively improved 10 demoulding of collector, it may be assumed that be effectively improved the first conductive layer and
The case where two conductive layers fall off from insulating layer 12.
On the thickness direction of collector 10, the opposite end surface of stress relief hole 180 can respectively with the first conductive layer 14
The upper face on the face of insulating layer 12 and the second conductive layer 16 away from insulating layer 12 is concordant, on the one hand design in this way can guarantee
On the other hand the connective stability of articulamentum 18 and the first conductive layer 14 and the second conductive layer 16 can guarantee that entire collector 10 exists
Flatness on thickness direction, consequently facilitating the production of subsequent pole piece.
Stress relief hole 180 can be circular hole, elliptical aperture or approximate circle irregular hole.Preferably, stress relief hole
180 be circular hole, the case where by the way that stress relief hole 180 to be designed as circular hole, can be relieved 18 stress concentration of articulamentum, so as to
Improve the structural strength of articulamentum 18；Similarly, which is also designed to circular hole, to alleviate 12 internal stress collection of insulating layer
In situation, to improve the structural strength of insulating layer 12.In the present embodiment, by by stress relief hole 180 and through hole 120
It is both designed as circular hole, can be relieved the problems in 10 stress collection of collector, to improve the structural strength of collector 10, alleviates afflux
There is the case where disconnected band in the processes such as coating cold pressing in body 10.
In addition, the edge of the stress relief hole 180 is more smooth, that is to say, that the stress relief hole 180 can be for smooth
The circular hole at edge, it should be noted that the edge of the stress relief hole 180 is to lean on the first conductive layer 14 and the second conductive layer 16
The part of nearly stress relief hole 180, by making on the first conductive layer 14 and the second conductive layer 16 close to stress relief hole 180
Part is in smooth shape, it may be assumed that does not have burr and metal fillings, to improve 10 safety in utilization of collector.
Wherein, the internal diameter of stress relief hole 180 is 20um~50um, it is preferable that the internal diameter of the stress relief hole 180 is
On the one hand 25um~35um too small can lead to stress between conductive layer and insulating layer 12 to avoid the internal diameter of stress relief hole 180
On the other hand the situation of releasing effect difference can be released to alleviate the case where conductive layer is separated with insulating layer 12 to avoid stress
The internal diameter of discharge hole 180 is excessive, so as to cause active material blanking from stress relief hole 180 in subsequent coated active material
Situation reduces the coating difficulty of active material and reduces the cost of manufacture of pole piece.
One optionally in embodiment, each stress relief hole 180 is uniformly arranged in array, and design can be relieved afflux in this way
The case where stress of body 10 is excessively concentrated, so that the structural strength of collector 10 can be improved.
Preferably, the spacing in each row stress relief hole 180 between two neighboring stress relief hole 180 be 0.5mm~
Spacing in 1mm or each column stress relief hole 180 between two neighboring stress relief hole 180 is 0.5mm~1mm, by will be
Spacing on line direction or column direction between two neighboring stress relief hole 180 controls one side in the range of 0.5mm~1mm
Face can alleviate pitch of holes excessive the case where causing conductive layer to can be easily separated with insulating layer 12 and avoid pitch of holes is excessive from causing
On the other hand the excessive situation of the resistance of collector 10 can be relieved too small stress relief hole 180 processing difficulties of causing of pitch of holes
Situation then improves the speed of production of collector 10 to improve the process velocity of stress relief hole 180.
It should be noted that concentrated to alleviate the stress of collector 10, it is two neighboring in each row stress relief hole 180 to answer
Spacing between power relief hole 180 and the spacing phase between two neighboring stress relief hole 180 in each column stress relief hole 180
Together, it and is respectively positioned in the range of 0.5mm~1mm.
As shown in table 1, table 1 is shown in each row stress relief hole 180 between two neighboring stress relief hole 180 in the ranks
Away between two neighboring stress relief hole 180 in each column stress relief hole 180 column pitch and demoulding ratio (conductive layer is from insulation
12 probability that falls off of layer) and the resistance (membrane resistance) of collector 10 between relationship:
Table 1
| Line space (unit: um) | Column pitch (unit: um) | Demoulding ratio | Membrane resistance (unit: m Ω) |
| 0.5 | 0.5 | 0 | 30mΩ |
| 1 | 1 | 0 | 35mΩ |
| 2 | 2 | 0.20% | 38mΩ |
| It does not punch | It does not punch | 0.80% | 60mΩ |
Optionally in embodiment, the porosity of collector 10 is 0.02%~2% for another, on the one hand can alleviate hole
Rate is too small the case where causing conductive layer and insulating layer 12 can be easily separated and avoid the too small resistance for leading to collector 10 of porosity
On the other hand excessive situation can be relieved the poor situation of the excessive intensity for leading to collector 10 of porosity.
It should be noted that when size of the stress relief hole 180 on the thickness direction of collector 10 and collector 10
When thickness is identical, which is ratio of the sum of the area of each stress relief hole 180 with the gross area of collector 10, the stress
The area of relief hole 180 and the gross area of collector 10 are the face on the perspective plane obtained on the thickness direction of collector 10
Product.
Wherein, the thickness for the insulating layer 12 being previously mentioned can be 4um~50um, it is preferable that insulating layer 12 with a thickness of 7um
On the other hand~15um, situation that on the one hand can be excessive to avoid the excessive resistance for leading to collector 10 of 12 thickness of insulating layer may be used
To avoid the situation that the too small structural strength for leading to collector 10 of 12 thickness of insulating layer is lower and collector 10 is overweight, that is,
It says, collector 10 can also be reduced while improving 10 structural strength of collector, reducing the weight of collector 10 in this way by designing
Resistance.
Optionally, the conductive layer being previously mentioned with a thickness of 0.005um~50um, it is preferable that conductive layer with a thickness of 2um
~10um, it may be assumed that the thickness of the first conductive layer 14, the second conductive layer 16 and articulamentum 18 is in the range of 2um~10um, a side
Face can alleviate the excessive situation for being difficult to be coated uniformly on insulating layer 12 of conductive layer thickness, to reduce the system of collector 10
Make difficulty, it on the other hand can be to avoid the too small situation for causing 10 resistance of collector excessive of conductive layer thickness, that is to say, that in this way
Collector 10 can also be reduced while the manufacture difficulty of the coating difficulty and reduction collector 10 that reduce conductive layer by designing
Resistance.
Based on above structure, the embodiment of the present application also provides a kind of pole pieces comprising described in any of the above-described embodiment
Collector 10, when the pole piece is anode pole piece, the conductive layer of the collector 10 can be used aluminium and be made, when the pole piece is negative
When the pole piece of pole, the conductive layer of the collector 10 can be used copper and be made.
The embodiment of the present application provides a kind of battery again comprising above-mentioned pole piece.
In addition, as shown in figure 5, the embodiment of the present application also provides a kind of 10 production method of collector, it is above-mentioned for making
Collector 10 described in any embodiment comprising:
Step 500, insulating layer 12 is made；
Step 502, insulating layer 12 is punched, so as to form multiple through holes 120 on insulating layer 12；
Step 504, conductive material is plated on the insulating layer 12 for being formed with multiple through holes 120, so that insulating layer 12
The first conductive layer 14, the second conductive layer 16 and articulamentum 18 are respectively formed on the inner wall of opposite sides face and through hole 120, even
It connects layer 18 and connects the first conductive layer 14 and the second conductive layer 16.
Optionally, above-mentioned steps 500, specifically:
Insulating layer 12 is made using high molecular material, since insulating layer 12 is made of high molecular material, to insulating layer
When 12 dozens of through holes 120, macromolecule clast melts at a high temperature of generating in drill process, only generates a small amount of flue dust, not shadow
It rings further battery to use, improves the safety in utilization of collector 10.
When making collector 10, if then beating through hole 120 again using first conductive layer is formed on the insulating layer 12
Scheme, there are some drawbacks for this scheme, specifically, are made, are punching since conductive layer generallys use conductive metal material
Cheng Zhong, the metal fillings to fall off can be adhered to around through hole 120, which penetrates readily through isolation in battery use process
Film causes battery failure or explodes, and greatly reduces the safety in utilization of the collector 10.In addition, due to stress when punching
Reason can make to punch edge contraction or corrugation, and conductive layer is easy to cause to separate with insulating layer 12.
In order to overcome drawbacks described above, the present embodiment using first through hole 120 is beaten on the insulating layer 12, then again by conduction material
Material is plated in the scheme of insulating layer 12, compared to first plating conductive material on the insulating layer 12, then beats the side of through hole 120 again
Case can make the conductive layer of 120 edge of through hole shrink or wrinkle situation, thus slow to avoid when punching due to stress
The case where conductive layer and insulating layer 12 can be easily separated is solved.
Wherein, due to first beating through hole 120 on the insulating layer 12, then conductive material is plated on the insulating layer 12 again, this
Sample design can make to be respectively formed the first conductive layer 14 on the opposite sides of insulating layer 12 and the inner wall of through hole 120, second lead
Electric layer 16 and articulamentum 18, articulamentum 18 connect the first conductive layer 14 and the second conductive layer 16, wherein since articulamentum 18 is located at
In through hole 120, and the articulamentum 18 connects the first conductive layer 14 and the second conductive layer 16, and design is so that conductive layer wraps up in this way
On the insulating layer 12, the case where conductive layer falls off from insulating layer 12 can be reduced, and in subsequent cold pressure procedure, insulating layer 12
Elongation is reduced under the obstruction of articulamentum 18, therefore, can be reduced and be generated stress between insulating layer 12 and conductive layer, so that
Stress between insulating layer 12 and conductive layer is less than the cohesive force between insulating layer 12 and conductive layer, to be effectively improved collector
The case where 10 demoulding, it may be assumed that be effectively improved the first conductive layer and the case where the second conductive layer is separated with insulating layer 12；In addition, due to
Articulamentum 18 belongs to a part of conductive layer, and the articulamentum 18 is also conductive, therefore, connects insulating layer by articulamentum 18
The first conductive layer 14 and the second conductive layer 16 of 12 opposite sides, can reduce the resistance of collector 10.
Optionally, step 502, specifically:
Insulating layer 12 is punched using laser drilling device, it can be achieved that high-frequency high density is punched, raising punching is fast
Degree reduces working hour, to reduce production cost.
Optionally, step 504, specifically:
Conductive material is plated in the insulating layer 12 for being formed with multiple through holes 120 by vapour deposition process or chemical plating
On, the physical deposition methods preferably in vapour deposition process, in order to control the thickness and uniformity of conductive layer, and to insulating layer 12
It damages small.Wherein, the preferred evaporation of the physical deposition methods and sputtering method, the preferred vacuum vapour deposition of evaporation, thermal evaporation, electronics
At least one of beam evaporation method, the preferred magnetron sputtering method of sputtering method.
Based on above content, in a specific embodiment, when in the anode pole piece that the collector 10 is applied to battery,
The insulating layer 12 of the collector 10 is made of above-mentioned PET material, and the thickness b of the insulating layer 12 is 10um, and conductive layer uses
Aluminium is made, and the thickness c of the conductive layer is 2um, and on line direction or column direction between two neighboring stress relief hole 180
Spacing a be 1mm, the aperture e of each stress relief hole 180 is 30um, wherein in the present embodiment, in the mistake of production collector 10
Then Cheng Zhong plates the mode of conductive layer, therefore using first through hole 120 is beaten on the insulating layer 12 in order to make the company in conductive layer
The thickness for connecing layer 18 meets 2um, and the articulamentum 18 encloses and sets the aperture e of the stress relief hole 180 to be formed and meet 30um, then this is passed through
The aperture of through-hole 120 is d, d=e+2 × c=30+2 × 2=34um.Due to being provided with 2um thickness on the inner wall of through hole 120
Articulamentum 18, and the articulamentum 18 connection be located at the opposite sides of insulating layer 12 in a thickness direction the first conductive layer 14 and
Second conductive layer 16 (thickness of first conductive layer and the second conductive layer is also 2um), so that the first conductive layer 14 is led with second
Electric layer 16 is connected, so that the resistance of the collector 10 is 30m Ω.
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for the skill of this field
For art personnel, various changes and changes are possible in this application.Within the spirit and principles of this application, made any to repair
Change, equivalent replacement, improvement etc., should be included within the scope of protection of this application.
Claims (10)
1. a kind of collector characterized by comprising
Insulating layer is formed with multiple through holes on the insulating layer；
Conductive layer, the conductive layer include the first conductive layer, the second conductive layer and connection first conductive layer and described second
The opposite sides of the insulating layer is arranged in the articulamentum of conductive layer, first conductive layer and second conductive layer, described
Articulamentum is arranged on the inner wall of the through hole.
2. collector according to claim 1, which is characterized in that the articulamentum is cyclic annular and encloses to set and be formed with stress and release
Discharge hole.
3. collector according to claim 2, which is characterized in that each stress relief hole is uniformly arranged in array.
4. collector according to claim 3, which is characterized in that
Spacing in stress relief hole described in each row between the two neighboring stress relief hole is 0.5mm~1mm；And/or
Respectively arranging the spacing in the stress relief hole between the two neighboring stress relief hole is 0.5mm~1mm.
5. collector according to claim 2, which is characterized in that the porosity of the collector is 0.02%~2%, institute
State ratio of the sum of the area that porosity is each stress relief hole with the gross area of the collector.
6. a kind of pole piece, which is characterized in that including collector described in any one of claims 1 to 5.
7. a kind of battery, which is characterized in that including pole piece as claimed in claim 6.
8. a kind of collector production method, for making collector described in any one of the claims 1 to 5, feature
It is, comprising:
Make insulating layer；
The insulating layer is punched, so as to form multiple through holes on the insulating layer；
Conductive material is plated on the insulating layer for being formed with multiple through holes, so that the opposite sides of the insulating layer
The first conductive layer, the second conductive layer and articulamentum, the articulamentum connection are respectively formed on the inner wall of face and the through hole
First conductive layer and second conductive layer.
9. collector production method according to claim 8, which is characterized in that the production insulating layer, specifically:
The insulating layer is made using high molecular material.
10. collector production method according to claim 8, which is characterized in that described be plated in conductive material is formed with
On the insulating layer of multiple through holes, specifically:
Conductive material is plated on the insulating layer for being formed with multiple through holes by vapour deposition process or chemical plating.
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| CN201810150732.7A CN110165223B (en) | 2018-02-13 | 2018-02-13 | Current collector, pole piece, battery and current collector manufacturing method |
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| CN201810150732.7A CN110165223B (en) | 2018-02-13 | 2018-02-13 | Current collector, pole piece, battery and current collector manufacturing method |
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| WO2022068207A1 (en) | 2020-09-30 | 2022-04-07 | 江苏卓高新材料科技有限公司 | Composite current collector, preparation method, and lithium ion battery |
| CN114512678A (en) * | 2020-11-16 | 2022-05-17 | Oppo广东移动通信有限公司 | Current collector, battery and electronic equipment |
| CN115602855A (en) * | 2022-12-14 | 2023-01-13 | 江苏正力新能电池技术有限公司（Cn） | Current collector, pole piece and battery cell |
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| CN110165223B (en) | 2024-06-07 |
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